Core drill rigs, also known as core drilling rigs, are specialized machines used to extract cylindrical samples (cores) from various materials such as rock, soil, concrete, and asphalt.
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[pdf] • : The said it was monitoring events in Vietnam closely, and urged restraint from all parties. Secretary of State , who is also a former , said the United States is "deeply concerned" that China has placed an oil rig in an area of the South China Sea also claimed by Vietnam, adding that the move was "provocative" and "aggressive".
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